Stretchable display panel and stretchable display device including the same

Abstract

Disclosed herein are a stretchable display panel and a stretchable device. The stretchable display panel comprises: a lower substrate having an active area and a non-active area surrounding the active area; a plurality of individual substrates disposed on the lower substrate, spaced apart from each other and located in the active area; a connection line electrically connecting a pad disposed on the individual substrate; a plurality of pixels disposed on the plurality of individual substrates; and an upper substrate disposed above the plurality of pixels, wherein the modulus of elasticity of the individual substrates is higher than that of at least one part of the lower substrate. Accordingly, the stretchable display device according to the present disclosure may have a structure that enables the stretchable display device to be more easily deformed when a user stretches or bends the stretchable display device and that can minimize damage to the components of the stretchable display device when the stretchable display device is deformed.

What is claimed is: 
     
       1. A stretchable display panel, comprising:
 a lower substrate having an active area and a non-active area adjacent to the active area; 
 a first plurality of individual substrates disposed on the lower substrate and located in the active area; 
 a second plurality of additional individual substrates disposed on the lower substrate in the non-active area; 
 a connection line electrically connecting a pad disposed on an individual substrate within the plurality of individual substrates; 
 a plurality of pixels disposed respectively on the plurality of individual substrates; and 
 an upper substrate disposed above the plurality of pixels,
 wherein a modulus of elasticity of the individual substrates is higher than that of at least one part of the lower substrate, and 
 wherein a surface of the individual substrates on which the pixels are disposed and a surface of the lower substrate on which the individual substrate are disposed are non-coplanar with each other. 
 
 
     
     
       2. The stretchable display panel of  claim 1 , wherein the low-potential voltage line is disposed on the lower substrate and the additional individual substrates to surround an edge of the lower substrate and is configured to provide a low-potential voltage to the plurality of pixels. 
     
     
       3. The stretchable display panel of  claim 1 , wherein the connection line has a curved shape, and the connection line is made of the same material as at least one of a plurality of conductive components disposed on the plurality of individual substrates. 
     
     
       4. The stretchable display panel of  claim 1 , wherein a modulus of elasticity of the plurality of additional individual substrates is higher than a modulus of elasticity of the lower substrate. 
     
     
       5. The stretchable display panel of any one of  claim 1 , further comprising an adhesive layer for bonding the lower substrate and the upper substrate,
 wherein the adhesive layer includes a plurality of first adhesive patterns which overlap with the plurality of individual substrates, and a second adhesive pattern excepting the plurality of first adhesive patterns. 
 
     
     
       6. The stretchable display panel of  claim 5 , wherein a transmittance of the second adhesive pattern is substantially the same as the transmittance of the plurality of polarizing patterns. 
     
     
       7. The stretchable display panel of  claim 1 , further comprising a conductive reinforcing member either disposed under or on the connection line. 
     
     
       8. The stretchable display panel of  claim 7 , wherein the conductive reinforcing member is disposed at an inner edge of an area where an amplitude of the connection line is largest. 
     
     
       9. The stretchable display panel of  claim 7 , wherein the conductive reinforcing member includes a base polymer, a conductive polymer, or a liquid metal. 
     
     
       10. The stretchable display panel of  claim 1 , wherein the connection line includes a base polymer and conductive particles distributed in the base polymer, and the connection line has a substantially straight shape. 
     
     
       11. The stretchable display panel of  claim 10 , wherein a height of a top surface of a portion of the base polymer which is overlapped with the plurality of individual substrates and a height of a top surface of the areas of the base polymer disposed between the plurality of individual substrates is substantially the same. 
     
     
       12. The stretchable display panel of  claim 10 , wherein the base polymer is formed as a single layer between adjacent individual substrates on the lower substrate, the conductive particles forming a plurality of conductive paths in the single layer of the base polymer. 
     
     
       13. The stretchable display panel of  claim 10 , wherein the conductive particles are distributed with a density gradient, such that conductivity resulting from the conductive particles is greatest at an upper portion of the base polymer. 
     
     
       14. The stretchable display panel of  claim 1 , wherein the lower substrate includes a plurality of first lower patterns which overlap with the plurality of individual substrates and a second lower pattern excepting the plurality of first lower patterns, a modulus of elasticity of the first lower patterns being higher than a modulus of elasticity of the second lower pattern. 
     
     
       15. The stretchable display panel of  claim 14 , wherein the plurality of first lower patterns is made of the same material as the plurality of individual substrates. 
     
     
       16. The stretchable display panel of  claim 14 , wherein the upper substrate includes a plurality of first upper patterns which overlap with the plurality of individual substrates and a second upper pattern excepting the plurality of first upper patterns, the modulus of elasticity of the first upper patterns being higher than the modulus of elasticity of the second upper pattern. 
     
     
       17. The stretchable display panel of  claim 16 , wherein the plurality of first upper patterns are made of the same material as the plurality of first lower patterns, and the second upper pattern is made of the same material as the second lower pattern. 
     
     
       18. The stretchable display panel of  claim 14 , further comprising a polarizing layer disposed adjacent to the upper substrate,
 wherein the polarizing layer includes a plurality of polarizing patterns overlapped with the plurality of individual substrates, and a flexible pattern excepting the plurality of polarizing patterns. 
 
     
     
       19. The stretchable display panel of any one of  claim 18 , wherein a transmittance of the flexible pattern is substantially the same as that of the plurality of polarizing patterns. 
     
     
       20. The stretchable display panel of  claim 18 , wherein a modulus of elasticity of the flexible pattern are lower than a modulus of elasticity of the plurality of polarizing patterns. 
     
     
       21. The stretchable display device of  claim 20 , wherein the flexible pattern have substantially the same modulus of elasticity as the second lower pattern. 
     
     
       22. A stretchable display panel, comprising:
 a lower substrate having an active area and a non-active area adjacent to the active area; 
 a first plurality of individual substrates disposed on the lower substrate and located in the active area; 
 a second plurality of additional individual substrates spaced apart from the first plurality of individual substrates in the active area, the additional individual substrates disposed in the non-active area and not overlapping the active area; 
 a connection line electrically connecting a pad disposed on an individual substrate within the plurality of individual substrates; 
 a plurality of pixels disposed respectively on the plurality of individual substrates; 
 a low-potential voltage line overlapping the additional individual substrate in the non-active area, and 
 an upper substrate disposed above the plurality of pixels, 
 wherein a modulus of elasticity of the individual substrates is higher than that of at least one part of the lower substrate.